IPA: /ɪnˈskruːtəblɪ/
KK: /ɪnˈskrutəbli/
In a way that is difficult to understand or interpret; mysterious or enigmatic.
She smiled inscrutably, leaving everyone wondering what she was thinking.
Inscrutably → It is formed from "in-" (meaning not) and "scrutari" (meaning to search or examine) combined with the suffix "-ably" (meaning in a manner). The word "inscrutably" means in a manner that cannot be searched or examined, thus referring to something that is mysterious or difficult to understand.
Think of something that cannot be 'searched' ('scrutari') because it is 'not' ('in-') clear or understandable — that's why inscrutably means something is mysterious.